[Dungeoneer] What happens to Trap cards

Hi !

We stumbled upon a problem yesterday evening:

If you play a trap card in your Dungeonlord Phase and the player overcomes the threat bound to the card, what happens to the card ?
Is it discarded ? I think so....

But what happens if it isn't overcome ? Does it go back to the pack / banes space ? Does it stay in its place on the map ? Or is it discarded too ?

What do I do with it ?

Thanks in advance,

Trap cards are classified as "Instant" (note the word 'instant' under the card name). Like all instants they are discarded after being played, regardless of outcome.